Tire-grip.



W. B. LASHAR.

TIRE GRIP.

MPLICATION FILED JAN- 7. 1911.

Patented Dec. 7", 1915.

' ITNESSES UNITED STATES PATENT OFFICE.

WALTER B. LASHAR. OF BRIDGEPORT. CONNECTICUT, ASSIGNOR TO AMERICAN CHAIN COMIPANY, INCORPORATED, 0F BRIDGEPORT, CONNECTICUT, A CORPORATION OF NEW YORK.

TIRE-GRIP.

Specification of Letters Patent.

Patented Dec. '3 3's To all wlzom it may concern:

Be it known that I, l" ALTER B. LASIIAR, a citizen of the United States, and resident of Bridgeport, county of Fair-field, and State of Connecticut, have made certain new and useful Inventions Relating to Tire-Grips, of which the following is a specification, taken in connection with the accompanying drawing, which forms part of the same.

This invention relates especially to tire grips in which the flexible side members are connected with a. number of chain tread members substantially consisting of hardened, unwelded, butted, curbed chain links, the cent 'al wearing links being preferably provided with interlocking ends which sulticiently engage so as to prevent in connection with the hardened body of the link, the ends working out of alinemcnt.

In the accompanying drawing, showing in a somewhat diagrammatic manner, illustrative embodiments of this invention, Figure 1 is an elevation showing a form of grip ap plied to a wheel. Fig. 2 is an enlarged per spective View showing a tread member and the connected parts of the side members. Fig. 3 is an enlarged view'partly in section of one form ofIlink, and Fig. l is a corresponding view showing another form of link. 4

As indicated in the drawings, the grip may comprise side members 2 of flexible character, which may be conveniently formed of' chain having their ends provided with any desired form of fastening hook or means 20 by which the grip may be readily attached or removed from the tire of the wheel 1 in the usual way. Thetread members 3 may be secured in any desired way to the side members 2 so as to be spaced around the wheel at the desired. intervals and preferably be sullicicntly loosely arranged as indicated so as to allow the grip to move freely around the tire under service conditions. The attaching means may, if desired, be in the form of special attaching links 4, 5 which may be readily secured to theiside chain'sfat thc proper intervals to firmly hold the connected tread members thereof, although if desired, the tread members may be secured to the side chains by links similar to those forming the rest of the tread members. lVith such special attaching links as indicated in Fig. 2, the. tread chains may be separately made and sold and if the attac iing .nks are left comparatively soft such separate tread chains may be conveniently attached to the side members as for instance, when it is desired to replacebroken or worn treads.

'lhe tread members are preferably formed of hardened, unwelded steel, batted, curbed chain links which, when formed of sulficiently high carbon steel and properly hardened or tempered, may be given sullicient rigidity to retain their shape under service conditions, thus producing a cheap and highly etlicient form of chain tread member for such grips. A desirable form of such link is shown in Fig. 3, the link 16 being. if desired. tor-med of suitable high carbon or special hardening steel such .as chrome steel or other suitable composition and the ends 17, 18, ot' the link being butted closeiy together so that the hardened link will have suilicieut rigidity to hold the ends in proper alinement as well as prevent opening under service conditions. If desired, however, such batted links may be used merely for the lateral securing links of each tread member which are exposed to considerably less wear than the central or wearing links of the tread chains. The central wearing links may in some cases be advantageously provided with suitably interlocking ends which have sutlicient engagement so as to prevent lateral "displacement of the link ends and e n-respendingly contribute to proper wearing qualities. Any form of interlocking or interengaging ends may be employed and .in Figs. 2 and a suitable substantially conical projection 7 is formed on one end oi the material of the link 6 and a corresponding conical recess or depression 8 formed in the other end of the link so that when hardened these interlocking ends effectively prevent lateral displacement and make a firm desirable tread link especially when the link is given a high degree of rigidity by being formed of high carbon steel and suitably hardened or tempered, it beingof course understood that similar results may be obtained 'by suitable case hardening of correspondingly lower or softer steels. .-\s shown in Fig. 2, each tread member may comprise. a number of central nearing links 6 having such interlocking to attaeh the tread memhers to the side t'hains er memhers.

Having deserihed this invention in conneet'ion with a numher ot illustrative einhodiments. propnrtinns sizes. shapes and materials at parts. to the details ot whieh dist-Insure the invention is not at course to he limited. what. is: claimed as new and what is den: ed to he seeured hv Letters Patent is set forth in the appended claims.

1. 'the tire grip comprising tread members and eonnerted chain side mmnhers forined'with detaehahle fastening means to readil) apply and remove the grip 't'rom a vehiele tire and allow the grip to move freely around the tire under service conditions. said tread memhers comprising at taehing' links at either end of the same at:- taehing them to the side memhers and being otherwise 'tormed o't unwelded. hardened steel. hntted. eurhed links, the central wearing links of said tread members having" suhstan'tiallv ennieallv interlocking ends.

The tire grip eoniprising tread inemhers and ennneeted tlexihle side meinhers formed with deta lnihle tastening means tn readily apply and remove the grip l'roni a vehiele tire and allow the grip to move around the tire under service eonditionsa said tread memhers comprising attaining means at; either end ot the saute attaching them to the side memhers and comprising unwelded, hardened steel, hutted. curhed links. the central wearing links oli said tread members l'ieing' formed otmaterial having substantially coniealtv int'erloeking ends located snhstantiallv midway between the ends at. the links.

3. The tire grip comprising; tread members and connected tlexihle side memhers formed with. :t'astening means to apply and remove the grip from a vehicle tire and allow the grip to move around the tire under service cornlitions, said tread meni hers hein largely formed ol' umvelded. hardened steel, huttietl curbed. links, the central links of said tread inenihers exposed to greatest wear having interlocking ends.

hers and connected t'l xihle side members said tread memhers consistinglargely ol unwelded. hardened. hutted. curhed links some of the links ol said tl'eadhnetnlm's having interlocking ends to assist in maintain ing the alinenient ot the ends oti said links.

5. The tire grip comprising tread lllt1llhers and connected tlexihle. side memhers t'ormed with t'astening means to apply' and remove the grip tron! a vehicle tire. said tread memhers eomprising unwelded. hard ened. hutted. eurhed linksv ha\ in; int.erloel\'- in g ends to assist in maintaining the alinement ol' the ends ol' said links.

(3. 'lhe chain tread niemher tor tire grips eomprisiin. atta hing links at either end ot' the same to attach said tread memher to side lnenihers and heing otherwise termed ol unwelded. hardened steel. hutled. enrhed links. the lintted ends ol' said links lining located intermediate the ends ot' the eorre spondin; links :rzthtlueentral links ol said thread niemhers expos d to greatest. wear having interlocking ends to assist in main taining the alinement ot' the ends ot said links.

T. The chain tread member for tire grips eonsistin; largelv ol' nnwelded. hardened, hutted. enrhed linksknnl comprising links having; interlorkinn' ends to assist in maintaininn' the alinement ol' the ends ol said links.

s. The chain tr ad inemher tor tire grips t'ttlltl l'i ll'l unwelded. hardened. lintted, enrhed links having interloelt'ing ends to assist in maintaining; the alinenient til the ends ol' said links.

S The chain tread ntemher tor tire. grips consisting lar Jetv nt I nwelded; hardened. lit|tt(tl.(lt1'l) (l link the hutted ends ol the link material hein; located intermediate the. ends of the links and the rentl'al links ot' said tread memher expos d to greatest, wear having interlocking ends to assist in maintainiug alinem nt thereol'.

Witnesses:

liAhltY l1. Dnxtztx, Jtissn: ll. Km. 

